Characterization of the sorption of europium(III) on calcite by site-selective and time-resolved luminescence spectroscopy

被引：44

作者：

Piriou, B

Fedoroff, M

Jeanjean, J

Bercis, L

机构：

[1] CNRS,CTR ETUD CHIM MET,F-94407 VITRY SUR SEINE,FRANCE

[2] ECOLE CENT PARIS,LAB CHIM & PHYSICOCHIM MOL,F-92295 CHATENAY MALABR,FRANCE

来源：

JOURNAL OF COLLOID AND INTERFACE SCIENCE | 1997年 / 194卷 / 02期

关键词：

sorption; europium(III); neodymium(III); calcite; site-selective and time-resolved luminescence spectroscopy;

D O I：

10.1006/jcis.1997.5115

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Sorption of europium(III) on calcite from aqueous solution was investigated by kinetics and sorption isotherms at 323 K and by site-selective and time-resolved luminescence spectroscopy at 15 K. Three sorption sites (A, B, C) were characterized by this last technique. B constitutes a major family which appears in all samples with sorbed Eu and is characterized by an environment involving water or hydroxyl ions. The C family is observed only for the highest Eu concentrations. In these sites, the environment is more hydrated than in sites B. Site A constitutes a minority but appears in all samples. It corresponds to the centrosymmetric structural Ca site of calcite in position 2b, thus demonstrating that sorbed Eu(III) can substitute for Ca in calcite. (C) 1997 Academic Press.

引用

页码：440 / 447

页数：8

共 24 条

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